St. Mary’s detectives raided a casino operation in Charlotte Hall just before midnight on Sunday night, shutting down the table games and reporting the next day that they seized its financial records and nearly $20,000.

No arrests have been made from the ongoing investigation of the shopping center storefront office of TPR Inc., sheriff’s Capt. Daniel Alioto said at midday Monday as the local law officers, aided by FBI agents, continued their work.

“We are following the money,” Alioto said, to determine the relationship between the casino, its manager and Thoroughbred Placement Resources, a racehorse-rescue organization in Upper Marlboro.

“They were wrapping up a session” when law officers arrived with a search warrant, the captain said, at the Charlotte Hall location. “For the most part,” he added, “everybody that we ran into was cooperative.”

A separate raid at the home of the casino manager’s home found more documents and $5,000, according to the detective.

George Wells said Monday afternoon that the money at his home was to pay for the rental of the casino’s gaming tables, and that he has continuously made all his paperwork available from the games, which he said benefit “good charities” in the area.

“It all had to do with the [games’] dealers being compensated,” Wells said. “We buy them food. They come in and we give them a meal.”

A separate casino operation, titled Arden’s ARC animal rescue, was located at New Market Plaza. Alioto said that facility voluntarily closed down when its operators were advised of the investigation.